Desktop/Android/HTML5/iOS Java game development framework
Solar2D Game Engine main repository (ex Corona SDK)
Free game engine for development of desktop, mobile, and web games
Tugeny is a tournament organization software.
LDraw™ editor for LEGO® style digital building instructions.
Compact/ Chess Interchange Format
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3